Abstract
The title complex, [Ce(C
2
H
6
OS)
8
]
2
[Mo
6
O
19
]
3
·4C
2
H
6
OS, was obtained as a byproduct of the reaction of [(C
4
H
9
)
4
N]
2
[Mo
6
O
19
] with Ce(NO
3
)
3
·6H
2
O and phthalic acid in dimethylsulfoxide solution. The asymmetric unit consists of a complex [Ce(C
2
H
6
OS)
8
]
3+
cation, one and a half of the Lindqvist-type [Mo
6
O
19
]
2−
polyanions and two dimethylsulfoxide solvent molecules; the half polyanion lies on an inversion center. The Ce
3+
ion is coordinated by eight dimethylsulfoxide ligands through the O atoms in the form of a distorted square antiprism. The Ce—O bond lengths range from 2.429 (6) to 2.550 (5) Å. The cohesion of the structure is ensured by S⋯O [3.115 (6), 3.242 (10) and 3.12 (3) Å], O⋯O [3.037 (10) Å] and C—H⋯O interactions between cations and anions. The S and C atoms of a dmso ligand are disordered over three sites in a 0.45:0.30:0.25 ratio. The dimethylsulfoxide solvent molecules are highly disordered and could not be modelled successfully; their contribution was therefore removed from the refinement using the SQUEEZE routine in
PLATON
[Spek (2009
▶
).
Acta Cryst.
D
65
, 148–155]. Potential solvent-accessible voids of 500.0 Å
3
occur in the crystal structure.